Need the answers and explanation+work to go with it cause I need to understand it

Can someone me and plz do the problem

Pyotr tchaikovsky sporting goods operates on a 45% overhead based on the selling price, which results in an overhead of $65.34 on the newest version of an air hockey game set. if the air hockey game set costs pyotr tchaikovsky sports $49.32, find the selling price, the markup, and the net profit.

A. what does the point (4, 122) represent? b. what is the unit rate? c. what is the cost of buying 10 tickets?